Gas producer and steam boiler



April 28, 1931- A C. E. LUcKE 1,802,475

GAS PRODUCER AND STEAM BOILER Filed April 13. 1928 2 SheveSSheet l Tuk" @wanted "f3 CHARLES E. LUCKE, F NEW YGRK, N. Y., ASSIGNOB, BY MESNE ASSIGNMENTS, TO

FULLER LEHGH COMPANY, A CORPORATION 0F DEL.lit'W'AlEtIElk GAS PRODUCER AND STEAM BOILER Application filed. April 13,

This invention relates to a steam boiler below the setting of which a rotating gas producer is located and the producer gas passes directly into the boiler furnace where air is intimately mixed therewith for combustion purposes.

The invention will be understood from the description in connect-ion with the accompanying drawings, in which Fig. 1 is a vertical section through an illustrative embodi ment of the invention; Fig. 2 is a section along the line 2-2 of Fig. 1; Fig. 3 is a. section on an enlarged scale showing one of the details;` Fig. 4 is a vertical section, partly broken away, showing a modification; Fig. 5 is a horizontal section through the furnace of another modification, and Fig. 6 is a section along the line 6 6 of Fig. 1.

In the. drawings, reference character 1 indicates the furnace of a boiler above which a water tube boiler may be located. Only a portion of the boiler is shown with the inclined tubes 2 that are connected to uptake and downtake headers in the well-known 5 way. lThe furnace walls are indicated at 3 and the furnace is open at the lower end.

Horizontal headers 4 and 5 are located outside of the furnace walls and are connected to the water circulation system of the boiler by .ipes 6 and 7, respectively. The headers 4 am? 5 are connected by rows of tubes 8 extending through the furnace, the rows being separated some distance from each other. Air ducts 9, preferably made of refractory 5 material and being provided with openings 10 on opposite sides thereof, extend from the air space 11 outside of the boiler furnace and rest upon the tubes 8. The air space 11 is supplied with air under pressure through the inlet 12 from any convenient source so that the air will be forced out through the openings 10.

A rotary gas producer 15 1s located below the furnace and is circular in cross-section.

' rIhe upper edge of the wall of the producer is provided with a circular groove 16 into which a flange 17 at the lower end of the furnace projects to form a gas-tight seal.

rThe gas roducer is rotated by means of a pinion 18 riven from any convenient source 1928. Serial No. 269,659.

of power. The pinion 18 meshes with a circular rack 19 on the gas producer and the producer is supported on supporting rollers 2O that roll upon a circular track 21. An ash hopper 22 is provided in the lower portion of the producer and a stationary plow 23 extends into the same to remove the ashthat accumulates.

A blast inlet 24 extends into a pipe 25 in the lower end of the producer to supply air and steam in proper proportions. Hoods 26 are located above the pipe and serve to distribute the blast passing out of the upper end of the pipe 25. Branches 27 extend from the pipe 25 into an annular distributor 28 in the wall of the producer and holes or openings 29 are provided on the insideof the distributo: 28 to permit air to pass into the producer.

A coal feed or spout 30 provided with a regulating valve 31 extends through the lower portion of the furnace wall 3 and feeds coal into the producer below the furnace. A hollow stirrer or coal bed agitator 32 also extends through the lower portion of the furnace wall 3 and is revoluble in a bearing 33 in this wall. The projecting end of the agitator extends downwardly into the coal bed and an oscillating rod 34, operated by an eccentric 34 or in any other convenient manner, is connected to an arm 35 on the stirrer 32 and serves to oscillate the saine in its bearing 33, so that the stirrer or coal bed agitator can be turned to stir the mass over the entire upper area of the producer coal bed. A. water pipe 36 extends into the stirrer 32 through a bushing 37 and cooling water passes into and through this pipe 36 from the hose 38 and passes into the annular space between the pipe and stirrer 32, thence out through the outlet 39.

In the modification shown in Fig. 4, the parts similar to those already described are designated by the same reference characters and it is not thought necessasry to repeat the description of those parts. In this modification, a pipe 4() extends across the lower portion of the furnace and is movable in bearings in the furnace walls, so that the stirrer or coal bed agitator 41 can be moved to stir all parts of the upper portion of the coal bed in the producer 15. The pipe 42 is provided for introducing water for cooling the stirrer and the pipe 40. The coal inlet 43 is provided with a screw conveyor 44 to feed coal into the producer 15.

In the modification shown in Figs. 5 and 6, the lower portion of the furnace wall 45 is provided with a ledge or inward extension 46 and the coal feeder 47 enters the furnace slightly above the ledge 46 so that, when the coal is introduced through the feeder 47, it will remain for a suicient length of time upon the ledge 46 to become heated sufliclently to be sticky when it falls into the producer 15. This is especially useful to prevent dust from rising from the coal and causing slag to form from the ashes as the hot products of combustion pass through the furnace.

By this invention, producer gas is produced in a producer without the usual top and enters the lower end of the boiler furnace without the usual bottom where combustion air is intimately mixed with the same at a plurality of points as the combustion air asses from the air ducts 9 through the openings 10. In this way a hot zone is produced above the air admission ducts and there is a cooler zone below these ducts. The ducts limit the radiant heat that would otherwise pass from the hot furnace walls above the ducts down on top of the producer bed and its parts, thus leaving the top of the producer .at about the same temperature as in ordinary producers. The same means result in a high degree of cleanliness as to slag forming solids in the upper hot zone.

Changes and modications can be made without departing from the spirit and scope of the invention.

I claim:

1. In a boiler, a furnace, a water tube boiler having tubes above said furnace, rows of parallel air ducts of refractory material extending across said furnace, the ducts in one row being staggered with respect to those in another row, said ducts being provided with openings whereby combustion air is supplied to the individual streams of rising fuel gases into which said ducts divide the rising fuel stream, and water tubes extending across said furnace and supporting said ducts, said tubes being connected to the water circulation system of said boiler and absorbing heat from said ducts.

2. In a boiler, a furnace, a water tube boiler having tubes above said furnace, rows of parallel air ducts of refractory material extend- Ling across said furnace, the ducts in one row being staggered with respect to those in another row, said ducts being provided with openings whereby combustion air is supplied to.tl1e individual streams of rising fuel gases into which said ducts divide the rising fuel 

